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Triangular Architecture for Rare Language Translation (1805.04813v2)

Published 13 May 2018 in cs.CL and cs.AI

Abstract: Neural Machine Translation (NMT) performs poor on the low-resource language pair $(X,Z)$, especially when $Z$ is a rare language. By introducing another rich language $Y$, we propose a novel triangular training architecture (TA-NMT) to leverage bilingual data $(Y,Z)$ (may be small) and $(X,Y)$ (can be rich) to improve the translation performance of low-resource pairs. In this triangular architecture, $Z$ is taken as the intermediate latent variable, and translation models of $Z$ are jointly optimized with a unified bidirectional EM algorithm under the goal of maximizing the translation likelihood of $(X,Y)$. Empirical results demonstrate that our method significantly improves the translation quality of rare languages on MultiUN and IWSLT2012 datasets, and achieves even better performance combining back-translation methods.

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Authors (6)
  1. Shuo Ren (22 papers)
  2. Wenhu Chen (134 papers)
  3. Shujie Liu (101 papers)
  4. Mu Li (95 papers)
  5. Ming Zhou (182 papers)
  6. Shuai Ma (86 papers)
Citations (33)

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